.chermant {
  width: 100%;
  max-width: 640px;
  min-width: 320px;
  margin: 0 auto;
  background-color: #f3f3f3;
}
/* 头部 */
.header {
  width: 100%;
  height: 40px;
  line-height: 40px;
  max-width: 640px;
  min-width: 320px;
  background-color: #ff0000;
  position: fixed;
  z-index: 999;
}
.header .back {
  width: 100px;
  height: 100%;
  font-size: 25px;
  color: white;
  display: inline-block;
  position: absolute;
  margin-left: 20px;
}
.header .s_user {
  width: 100%;
  height: 40px;
  line-height: 40px;
  text-align: center;
  color: white;
  font-size: 20px;
}
/* banner图 */
.banners {
  width: 100%;
  position: relative;
}
.banners .picImg {
  width: 100%;
  display: block;
  outline: none;
}
.banners .contains {
  position: absolute;
  width: 100%;
  height: 50%;
  background-color: pink;
  top: 50%;
  transform: translateY(-50%);
  padding: 0 30px;
}
.banners .contains .c_left {
  width: 80px;
  height: 80px;
  float: left;
  background-color: white;
}
.banners .contains .c_left img {
  width: 100%;
  height: 100%;
  display: block;
}
.banners .b_down {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 6px 10px;
  background-color: rgba(255, 255, 255, 0.3);
  text-align: center;
}
.banners .b_down .one {
  width: 33.33%;
  height: 100%;
  float: left;
}
.banners .b_down .one a {
  width: 100%;
  display: block;
  font-size: 20px;
  color: white;
  float: left;
}
.banners .b_down .one p {
  width: 100%;
  font-size: 16px;
  color: white;
  padding-bottom: 2px;
}
.banners .b_down .one:nth-of-type(2) {
  border-left: 2px solid rgba(255, 255, 255, 0.6);
  border-right: 2px solid rgba(255, 255, 255, 0.6);
}
/* 导航块 */
.nav {
  width: 100%;
  background-color: #fff;
}
.nav > ul {
  width: 100%;
}
.nav > ul > li {
  width: 33.333333%;
  float: left;
  text-align: center;
  border-right: 1px solid silver;
  border-bottom: 1px solid silver;
  padding-left: 3%;
}
.nav > ul > li a {
  display: block;
  width: 100px;
  height: 100%;
  padding-top: 10px;
  text-align: center;
}
.nav > ul > li img {
  width: 45px;
}
.nav > ul > li p {
  margin-top: 5px;
  margin-bottom: 5px;
}
/* 内容部分 */
.content {
  width: 100%;
  margin-top: 10px;
  max-width: 640px;
  min-width: 320px;
  position: relative;
  padding-bottom: 80px;
}
.content ul {
  width: 100%;
  position: relative;
  overflow: hidden;
}
.content li {
  width: 100%;
  height: 100%;
  margin-bottom: 10px;
}
.content img {
  width: 100%;
  display: block;
  outline: none;
}
/* 底部 */
.foot {
  width: 100%;
  height: 50px;
  background-color: skyblue;
  max-width: 640px;
  min-width: 320px;
  position: fixed;
  bottom: 0;
  overflow: hidden;
}
.foot > ul {
  width: 100%;
  text-align: center;
}
.foot > ul > li {
  width: 25%;
  float: left;
  height: 50px;
  line-height: 50px;
}
.foot > ul > li > a {
  width: 100%;
  height: 50px;
  display: block;
  position: relative;
  margin-top: -5px;
  font-size: 30px;
}
.foot > ul > li > a > p {
  width: 100%;
  height: 20px;
  font-size: 12px;
  position: absolute;
  bottom: 8px;
}
.foot > ul > li .mers {
  color: red;
}
